The article presents the results of studying the influence of cortical and vegetative mechanisms of regulation on the transaminase enzymes activity in blood serum of dry sows under exposure to a technological stimulus. The experiments were carried out on sows of large white breed of 3 years old. The results of study have shown that the indicators of conditioned reflex activity affect the activity of reamination enzymes in blood serum both under physiological conditions and after the exposure to a technological stimulus. According to the correlation analysis, the relationship between the strength and balance of cortical processes with serum alanine aminotransferase activity (r = 0.48–0.65; р≤0.05–0.01), as well as the strength of cortical processes with aspartate aminotransferase activity (r = 0.51; р≤0.05). The significant influence (η2x = 0.23–0.36; р≤0.05–0.01) of the balance of cortical processes on the activity of alanine aminotransferase in blood serum was established. Instead, the tone of the autonomic nervous system had a significant influence on the activity of reamination enzymes only after the exposure to a technological stimulus. In particular, the significant degree of influence (η2x = 0.28; р≤0.05) of sympathicotonia on the activity of alanine aminotransferase in blood serum on the 7th day after exposure to a technological stimulus was established
sows, indicators of conditioned reflex activity, tone of autonomic nervous system, blood, alanine aminotransferase, aspartate aminotransferase